Custom Payment Gateway Integration with Shopify

Payments + Shipping & Fulfilment
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Topic summary

Main issue: A merchant in Azerbaijan needs to integrate Kapital Bank’s payment gateway into Shopify checkout. The gateway APIs are implemented, a bank-hosted payment form exists, and a partial Shopify custom app is built.

Current blocker: They must redirect customers from the Shopify checkout “Pay now” button to the bank-hosted payment page, but the developer cannot implement this redirect via the custom app. Without Shopify Plus, they believe checkout changes must be handled through the app.

Context: “Bank-hosted payment form” means the payment is completed on the bank’s external page; the needed “redirect” is sending the customer from Shopify’s final payment step to that page.

Impact: The store is losing sales during the delay.

Status/requests: The author has asked for expert guidance and followed up stating they are still stuck. No solution or concrete next steps have been provided; the thread remains unresolved.

Summarized with AI on December 12. AI used: gpt-5.
1

My shopify store is based in Azerbaijan, and my bank: Kapital Bank has offered me their payment gateway to connect using APIs. After working weeks with my developer the payment gateway has been completed, with the bank-hosted payment form and a partially developed Shopify app already in place. The remaining task is to connect the gateway to the Shopify checkout.

My developer has not been able to figure out how to add the redirect to the “Pay now” button through the shopify app”. We do not have shopify plus so we can online do this from the custom app and have been stuck on this point for days.

We have also been losing out on sales so can someone please help me figure this out, if there are any experts here. Thank you!

2

We are still stuck on this, can anyone help :disappointed_face: